@misc{indiciaee8ff2b91cc09,
  title = {Peripheral self-stimulation as a reward.},
  author = {H J Campbell},
  year = {1968},
  doi = {10.1038/218104a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/5643541/},
  note = {Source identifier: 5643541}
}